Evaporator.



c. L. SGEALITZ.

EVAIORATOR. APPLICATION, FILED In a, 1908.

Patented'Jan. 5, 1909.

WITNESSES ATTORNEY UNITED cant L.;-:SGH-ALITZ, or SAN rRAcIscd-cAuroaNIA.

' EVAPORATOB.

Specifioationof Letters Patent.

Patented Jan; 5. 1909.

Application filed. May s, 1908. Serial No. 431,689.

To all whom "it may concern? Be it known that I, CARL LQSOHALITZ, acitizen of the United States, residing in the city and County of SanFrancisco and State jecting down through the partition 2 into' ofCalifornia, have invented new and useful Improvements in Evaporators, ofwhich the following is a specification.

My invention relates toevaporatoraand especially to evaporatingapparatus for use in sugar refining.

The ob 'ect of this invention is to provide.

an upright multiple-efiectevaporator, thereby economizing space andgiving a maximum of heating surface; .also' to' provide means forremoving the. condensed moisture from the evaporating chambers; and toprovide means for maintainlnga uniform heat- .inthe evaporatingchambers, and for regulating the heat consistently with the vacuumformed in the chambers. 1 -.'The' invention consists of the parts andthe construction and combination of parts" as hereinafter more fullydescribed and claimed, having reference to-the accompanying drawings, inwhich H Figure 1' is a vertical section of the device. Fig. 2 is atransversesection. a J A represents a casing of any suitable size, Itis'preferably in the form-of an upright cylinder, and its interior.

shape or material.

is'divided ofi'ninto a series of superposed hambers by suit-able, convexpartitions 2. A steam coil 3 for heating purposes 15 arranged in thebottom of the initial or lowermost chamber 4, this coil connecting witha steam pipe 5 leading from any suitable source of steam supply. Theexhaust steam from coil 3 passes'out at- 6.' -E ach chamber in theevaporatoris also provided with a steam coil, or a pair'of coils; ashere shown at 7; these coils having their ends 8 pro- I .the chamberbelow, preferably: centrally thereof. These coils. each discharge attheir lower extrem ties proximate to the pe nphery of the evaporatorlnto a drain plpe 9: these several drain pipes 9 leading intoterialinthe lower chamber 4, and the exhaust created through the coils 7 andtheir inlets S-in' the several-chambers produces a partialvacuum in eachof the. chambers.

This results in causing the syrup orother liquid in the lower. chamberto boil at'a point" somewhat less than 212 Fahrenheit.

The steam rising from the boiling liquid in; chamber 4 is drawn outthrough the outlets 8 of the coil 7 immediately above to the exhauster.Of course, thesame suction is exerted through the several series ofcoils above. The material -to be evaporated is continually ted. in undersuitable head through the inlet 14' and finally reaches the mouth of'thepipe-12 in-"cham-ber 4. It'is at this moment that the suction in chamber'15 immediately above begins to act'and .draws up a portion of theliquid in chamber j 4 int-o chamber 15.

This liquid spreads out over the floor of the chamber, and soon the heatfrom the steamrising from chamber 4 and circulating-"through the coils?sets this elevated material in chamber 15 to boiling; and the steamrising from chamber 15 is drawn out through the coil 7 in the bot.- tomof chamber 16 above, just as in the first instance. The liquid in thechamber 15 gradually accumulates until itcovers the.

mouth of the pipe 12 in that chamber,.whereupon the vacuum, created inchamber. 16 draws up the liquid into. chamber 16, and this spreads out.and is heated and boiled again in the same way. Its steam is exhaustedin a similar manner, and the chambers 1718-19 above are gradually filledto the level oftheir respective pipes 12; the final evaporated productbeing drawnofi throughthe-outlet 20. g The condensed 1nois-' ture in theseveral series of coils 7 flows out through respective pipes 9 anddownward through the pipe 10 toa suitable point where it is finallydischarged from the exhauster, while the steam has an opportunity denser11.

to rise'upwards through the pipe 10 and be condensed in the enlargedpart of the .con-

As the mouth of each of the pipe-s12 in theseveral chambers 4-1516, etc,becomes sealed by the rising liquid in these chambers, the vacuum in thechamber above becomes correspondingly increased;

and consequently the boiling point in the chambers is correspondinglyreduced; Thus, for example, there may be five inches of vacuum inchamber i and the liquid will boil at 200 Fahrenheit. In chamber 15there will be ten inches of vacuum and the liquid will boil at 180.Fahrenheit. In

chamber 16 there might be fifteen inches of vacuum and the liquid willboil at 160 Fahrenheit;- and so on, until in chamber 19 1 there might betwenty-seven inches of vacuum andthe liquid would boil at 100Fahrenheit;

In order to suitably regulate the admission of the steam to' the initialsteam coil 3 and control the heat by the amount of vacuum, I

have shown the pipe leading tothe steam coil 3 as provided with a valve21 which may be opened by the pressure of the steam flowing from pipe'5.This valve is provided'with a stem 22 which pivots to a lever sautelatter being fulcrumed at one end to 24, and carryin a mercur cu at theo 'osite end, A

' small pipe 26, which may bejt'en or twelve inches in length, hasoneend entering chamber 1 and the other end dipping mto the mercury in thecup .25. There is a suflicie'nt quantity of mercury in the cup 25 tohold the valve 21 closed until say five inches of vacuum is created inchamber 4, which will result in drawing say five, inches of mercury upinto the pipe 26. This will reduce the amount of mercury in the cup 25so as to allow the steam pressure on the under side of valve 21 to forceopen the valve and admit steam into. the coil 3. Thus, by increasing ordecreasing the quantity of inercury in the cup 25, the amount of vacuumin the several evaporating chambers may be regulated accordingly, andthe heat in the several chambers maintained uniform;

The partitions 2 are preferably made arched, as shown, so that anymoist-urecondensing on the under side of these. parti tions will draintowards the periphery of the shell Aand there be caught by the an--nular shelves or shields 27; the moisture so collected passing outthrough small outlets 28 into the drain pipes 9. Itis understood thatthese outlets 28- are not large enough to intcrferewith the propersuction and cir-. culation through the coil 7.

Evaporators built according to these specifications are in use at thepresent time,

. and are operating successfully. I

-Hav1ng thus described my 4 invention,

' and an outlet, a valve in the inlet, and means controlled by thevacuum in the chamber for operating said valve.

An evaporator having an evaporating chamber, a steam coil inthe chamber,

means for creating a vacuum elf t in the chamber, a valve controllingthe a mission of steam to said coil, said valve having a stem, a leverto which the stem is coim ected, said lever carrying a mercury cup andweighted with" mercury normally to hold the valve closed, anda pipeentering the evaporating chamber and dipping'into the mercury in saidcup.

at. An evaporator having a plurality of super osed evaporating chambers,said cham ers. divided one from the other by arched part'itions ,'a coilresting on the top of each partition and having one end. ex

tending into the chamber below and the other end connected with asuitable exhaust apparatus, an exhaust apparatus therefor,

a steam coilfor heating'the initial chamber, Said 0011 having an lnletand an outlet, a

valve in the inlet and automatically con- "trolled by the vacuum in-thechamber, and

pipes for the flow of the liquid'to be evaporated leading fromrespective chamhers above and, opening-into the chambers below. 5. Anevaporator having multiple evaporating' chambers arrangeclone above theother, means for simultaneously creating a vacuum efi'ect ill-"theseveral chambers, a

steam coil for heating'the lowermost'chamher, a valve in said inlet, andmeans controlled by the -vacuum-for operating the valves, and suitableconnections between the chambers whereby on the production of a vacuumeffect in said chambers the material to'be evaporated is liftedsuccessively through the several chambers. .In testimony whereof I havehereunto set my .fhand in presence of two "subscribing witnesses. GARLL.'sor-mnrrz.

Witnesses: I

CHARLES Ennmux,

C. C. Conn.

